Fair Value of Financial Instruments - Schedule of Quantitative Information Associated with the Fair Value Measurement of the Company's Non-Recurring Level 3 Inputs (Detail) (Level 3 [Member], USD $)	0 Months Ended
	Aug. 31, 2013
In Process Research and Development [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
IPR&D asset
Non-recurring [Member] | Income Approach - Probability Weighted Discounted Cash Flow Analysis [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount rate (as a percent)	25.70%